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gfx2d: begin Sprite2D new design

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Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
This commit is contained in:
Stephen Gutekanst 2023-09-10 15:59:28 -07:00 • committed by Stephen Gutekanst
parent 77b95aa9a9
commit 4d2c917b66
1 changed files with 55 additions and 26 deletions
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81
src/gfx2d/Sprite2D.zig
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@ -41,6 +41,11 @@ pub const components = struct {
/// The size of the sprite, in pixels.
pub const size = Vec2;
/// The ID of the pipeline this sprite belongs to. By default, zero.
///
/// This determines which shader, textures, etc. are used for rendering the sprite.
pub const pipeline = u8;
};
const Uniforms = extern struct {
@ -181,6 +186,49 @@ pub fn deinit(sprite2d: *mach.Mod(.engine_sprite2d)) !void {
sprite2d.state.sprite_sizes.release();
}
pub fn engineSprite2dUpdated(
engine: *mach.Mod(.engine),
sprite2d: *mach.Mod(.engine_sprite2d),
pipeline: u32,
) !void {
_ = pipeline;
const device = engine.state.device;
// TODO: make sure these entities only belong to the given pipeline
// we need a better tagging mechanism
var archetypes_iter = engine.entities.query(.{ .all = &.{
.{ .engine_sprite2d = &.{
.uv_transform,
.transform,
.size,
.pipeline,
} },
} });
const encoder = device.createCommandEncoder(null);
var transforms_offset: usize = 0;
var uv_transforms_offset: usize = 0;
var sizes_offset: usize = 0;
while (archetypes_iter.next()) |archetype| {
var transforms = archetype.slice(.engine_sprite2d, .transform);
var uv_transforms = archetype.slice(.engine_sprite2d, .uv_transform);
var sizes = archetype.slice(.engine_sprite2d, .size);
encoder.writeBuffer(sprite2d.state.sprite_transforms, transforms_offset, transforms);
encoder.writeBuffer(sprite2d.state.sprite_uv_transforms, uv_transforms_offset, uv_transforms);
encoder.writeBuffer(sprite2d.state.sprite_sizes, sizes_offset, sizes);
transforms_offset += transforms.len;
uv_transforms_offset += uv_transforms.len;
sizes_offset += sizes.len;
}
var command = encoder.finish(null);
encoder.release();
sprite2d.state.queue.submit(&[_]*gpu.CommandBuffer{command});
command.release();
}
pub fn tick(
engine: *mach.Mod(.engine),
sprite2d: *mach.Mod(.engine_sprite2d),
@ -216,37 +264,18 @@ pub fn tick(
};
encoder.writeBuffer(sprite2d.state.uniform_buffer, 0, &[_]Uniforms{uniforms});
// Synchronize entity data into our GPU sprite buffer
// Calculate number of vertices
// TODO: eliminate this
var total_vertices: u32 = 0;
var archetypes_iter = engine.entities.query(.{ .all = &.{
.{ .engine_sprite2d = &.{
.uv_transform,
.transform,
.size,
.pipeline,
} },
} });
// TODO: eliminate these
var sprite_transforms = try std.ArrayListUnmanaged(Mat4x4).initCapacity(engine.allocator, 1000);
defer sprite_transforms.deinit(engine.allocator);
var sprite_uv_transforms = try std.ArrayListUnmanaged(Mat3x3).initCapacity(engine.allocator, 1000);
defer sprite_uv_transforms.deinit(engine.allocator);
var sprite_sizes = try std.ArrayListUnmanaged(Vec2).initCapacity(engine.allocator, 1000);
defer sprite_sizes.deinit(engine.allocator);
while (archetypes_iter.next()) |archetype| {
var transforms = archetype.slice(.engine_sprite2d, .transform);
var uv_transforms = archetype.slice(.engine_sprite2d, .uv_transform);
var sizes = archetype.slice(.engine_sprite2d, .size);
for (transforms, uv_transforms, sizes) |transform, uv_transform, size| {
try sprite_transforms.append(engine.allocator, transform);
try sprite_uv_transforms.append(engine.allocator, uv_transform);
try sprite_sizes.append(engine.allocator, size);
}
}
const total_vertices = @as(u32, @intCast(sprite_sizes.items.len * 6));
if (sprite_transforms.items.len > 0) {
encoder.writeBuffer(sprite2d.state.sprite_transforms, 0, sprite_transforms.items);
encoder.writeBuffer(sprite2d.state.sprite_uv_transforms, 0, sprite_uv_transforms.items);
encoder.writeBuffer(sprite2d.state.sprite_sizes, 0, sprite_sizes.items);
total_vertices += 6;
var pipelines = archetype.slice(.engine_sprite2d, .pipeline);
for (pipelines) |_| total_vertices += 6;
}
// Draw the sprite batch